Automatic gate.



M. BOOM.`

AUTOMATIC GATE.

APPLICATION FILED MAY 29, 1912.

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M. BOOM.

AUTOMATIC GATE.

APPLITION FILED MAY 29, 1912.

Patented Apr. 22, 1913.

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` 2 5 7. l 2 z F fx v/f ML 7 3 MINO BOOM, 0F BLADEN, NEBRASKA.`

AUTOMATIC GATE.

Specification of Letters Patent.

Application led May 29,1912. Serial No. 700,389.`

To allwhom t may concern.'

Be it known that` I, MI`No BOOM, a cltizen of the United States, residing at Bladen, 1n the county of Webster and State of Nebraska, have invented certain new and useful Improvements inAutomatic ates, of which the following isl a speclicatlon.

This invention relates to farm or stockyard gates, of the class in which the gate opening and closing means are actuated by the wheels of a vehicle, or by the feet of men;

The object of the invention is to provide a farm or stock-yard gate which 1s operated without the use of the hands and canlbe opened without a halt of the vehicle passing through. In orderthat my 1nvention may be fully understood, Vreference will 110W be made to the accompanylng drawings, in which: Figure 1 is a top plan view of a gate constructed in accordance therewith, the covering` platform being omitted. Fig. 2 is an elevational view of' the gatein closed position and in `dotted lines in open position, the platform and subJacent parts being in sect-ion on 1 1ne II--II of Fig. 1. Fig.3 is a longitudlnal sectional view on line III-III of Fig.11, the gate being in closed position, and theplatform shown. Fig. 4 is a detail view, `being a section on line IV--IV of Fig. 1. Fig. 5 1s a detail view of oneof the yoke-levers, detached from other parts.`

To receive the gate-operating mechanlsm, a shallow pit l is dug at each sideof the gate, `designated 6, 7 and 8. When the mechanism has been installed the pit is covered with a platform 3, which is on a level with the ground. The gate is pivoted at one corner, forvertical movement, upon a pin 4 held by `a bifurcated lug 5, secured to the platform 3. As shown the gat(` com` prises a rectangular i metal frame` 6, uprights17, and a filler` of woven wire 8. Weights 9 and 10 are `secured .in the respective upper corners of the gate.

Within the pit 1 are fourfulcrums 12, mounted on small concrete piers 13 that rise to the bottom -of the platform 3 and partly support same. Each of said piers is slotted as shown on Fig..1.

Mounted on each pairof fulcrums` `12 is a rectangular tilt-frame 14-15, comprising longitudinals 14, pivoted on said fulcrums,` and transversals 15 and 16. One inner corner of one `frame is provided with a` horizontally-extending arm 17, having an upward extension 18 which passes through a slot in the `platform and terminates in a fork 19. Similarly, the other frame 14-15 is provided with an arm 20 having an upward extension 21. with a fork 22, set in alinement with fork 19. Said` forks are located so as to receive and support one end of the gate when the latter 1s in open position.

The following description of `one end of the apparatus will apply to the other end thereof,` as they are duplicate. Rigidlyfixed to the middle of the transversal 15 is an inwardly-projecting stud 23, into which is threaded a headed screw 24, which serves as a fulcrum for a transverse bar 25, having `on its ends eyes 26. The fulcrum support on 24 is loose, to permit some play in a horizontal plane. Beyond each eye 26, two eyebolts 27 are mounted on the bar 15. Pivoted on said eyebolts are a pair of inwardly-extending links 28, each having an eye 29 at its inner end. Extending through said pair of eyes is a transverse rod 30, having a head 31 on its outer end and an eye 32 oniits inner end. Pivotally-mounted on the rod 30 is an actuating `yoke-lever 33,

which is formed as shown on Fig. 5, having v the two parallel companion members `33, an upper connecting-member 34, and a lower connectingyoke 35, all integral. The lever members proper 33 are provided with alined eyes 36, through which the rod 30 extends, thus pivotally-supporting the lever. Also integral with the lever members 33 are two rests 37, terminating in forks 38 `that rest upon the respective links 28.

connected to the respective ends of bar 25 by the short transverse rods 30. The yolielevers33 project through slots 42 in the platform, as shown on Fig. 3, and their cross members 34 are adapted `to be impinged on by the front wheels of a vehicle, and are spaced a proper distance apart for that purpose. They are also operable by the foot `of `a person stepping thereon. In normal positionosaid levers stand at or against one end of the slots 42.

Connected to the depending yokes 35 of yoke-levers 33, respectively, are two spiral tension-springs 43, which extend toward the Patented Apr. 22, `1913. i

Extending oppositely from the rests 37 are a pair `of There are two of` gate and are connected to cables 44, which pass around pulleys 45. and 46 and from the latter obliquely upward to the adjacent upper `corner of the gate, beingfastened to an eye 47 thereon. The pulleys 45 and 46 -are mounted on concrete piers A48, which are lsuitably anchored. Close to the center of "the pivoted bar 25, a pier 49is set. Thisv pier has a vertical bpre 50, across the middle of which is embedded a guide-plate 51, hav.-

ing an opening through which a vertical rod 52 slidably passes. On the `lower end of rod..

52 is a collar 53, adapted to slide'freely in the bore 5t).r Integral withthe upper end ofk `said rod are two loops 54 and 55. Through the `loop 54, which isdirectfly above the rod, passes atransverse bar 56, the ends of whlch lie close to and below the respective lugs 39 I of the yoke-levers 33, and in position tojbe struck by said lugs-when the yoke-levers are actuated. T The bar' 56 is'held rather loosely bythe loop 54, and is normally upheld by a compression spring `57 that rests on the rod guide 51. lThe'loop 55'onrrod 52 is engaged by atcranki58, on a transverse rock-'shaft 59,y 'having bearingsGOon two piers 61. On the opposite end of shaft 59 is a crank 62.

Referring to Figs. 1 and 2, the middle of the platform 3 is supported by va concrete wall 63, built across the pit and'beneaththe gate '2.` A gate-supportingffspring l64 is housed in an. opening 1, 1n the platform 'and Wall 63. Said Wallis cut away, as shown, to.

, receive a pair of lever-arms 65 of `gateclamps 66, whichj arms and clamps are pivoted on a pin 67 whose ends are embedded in the wall 63..` Said clamps are 1ocated close to the'outer endof thegate, and

are adapted to engage the gate frame 6 when: :the gate is in fully lowered position... The

lower clamp-arms 65 are pressed` apartby 'approachesfthe gate. The front wheels are guided so that each of them shall strike one ofthe yoke-levers 33, this is, theftop. portion 34 thereof. The movement and pressure-of the wheels yturn'said :levers downwardly about the pivot rodsY 30; the lugs 39 impinge on the crossbar 56 and depress said bar, equally atv both ends, loop 55 rocks the crank `58,\shafty 59 and crank62; thelatter pulls rod 69, WhichA caut-ates clamp arms 65 and 66 `of oneA half of the clamp.` A Ifurther effectief said movement of `the vyoke-levers 33 is'to increasethe .tension of springs 43.` The gate, being 4relieved ofthe .friction of one "raised by the vrpull of springsl43,assisted by ai to such a poinuthatit Will'pass'by and 20.- The wagon :or machine` passes levers can not Vbe turned'. pivotally, but are directly depressed by the wheels, .thereby de' pressing f the outer L e'nd l of the tilt-frame. 14-15 and up-tiltingthe inner end thereof,

fork, being 1fo`rcibly and suddenlyfraised,

by the tensioning; ofthe mainasprings 43. At the end of the fall,spring- 64 acts as a 'buiten The weight 9helps to compresssaid springso that thel bottomrail of the gate willv descend far` enough' to .separate and enter betweenthe clamp members-66, which hold it there -until one -of'th'emis 'again' dis-l engaged..` I have designed-the gateactuatpendently 'movable 4mounting-.of the yokeand the gate will not bevopcnedor` closed by suchvmovement. Thus an animal may depress one of the `yoke-levers and the gate of lsuiiicient width'to bringeach pair close enough together to allowaperson on foot to open the gateby placing ait'ootV on each yokeway.

I claim and desire to ent, is:y

comprising` a tiltably-mounted hollow` frame and extending into the path ofl vehiclel wheels, a'- spring; tending to open the gate,

means actuated by said levers together, for

the gate. Y

2. A ate and a gateopen1ng mechanism comprismga tiltably-mounted hollow frame located in ,a pit at' one `sidepof the gate, a

through the 'gateway and its'.` front 'wheels f then strike the yoke-,levers-BS rat. the other-V end of the platform. Inl ythis case,-; said which carries thek gate fork 19v 'or 22.,.'Ther` will throwl the gate back .past'its centerjof ,1V gravity and the gate 4willlfall to closed position, its fall beingy moderated and checked` ing mechanism f. with an` object in view of` preventlngtheaccidental opening or closing of the gate. This is the `objectjoit' the .indelevers, andthe pivoting Lof barsk 56 i and 25. Either end alone of bar 561may be depressed without moving downthe-rod 52. Hence]V either of the yoke-levers 33, alone, may `be depressed Without depressing Vsaid rod 52,

Having thus describedmy'invention what; `.secure by Letters Pat- 1. Agate and a gate-opening mechanism" locatedv `in a pit at one side of thegate, la,

pair of yoke-levers mountedon. said frame means normally holding the gate closed, and

actuating said gate-holding means to'release holding member 66. will immediately r be y 0 thrust from, spring 64,1through the cables 44,57

vity into the dotted line position, Fig.; 2, W ere itsfv v frame will come to res'tupon the forks 19 ioo will not be opened. The yoke levers lmay be lever of a pair, simultaneously,` and close the gateby actuating-the other pairin the samel lever pivoted on said frame, links pivoted on said frame adjacent the ends of said lever, two yoke-levers floatingly `supported by said links and lever and projecting into the path of vehicle wheels, a :spring tending to open the gate, means normally holding the gate closed, and means actuated by said levers together, for actuating said gateholding means to release the gate.

3. A gate, and a gate-opening mechanism comprising a tiltably-mounted hollow frame located in 4a pit at one side of the gate, a pair of `yoke-levers iloatingly-mounted on said frame and extending into the pathof vehicle-wheels, a pivoted bar having lts ends located to be moved by said yoke-levers respectively, a spring-pressed support forthe center of said lever, means normally-holding the gate closed, and means actuated by said lever to cause said gate-holding means to release the gate.

4. A `gate,` and gate-closing mechanism comprising a frame tiltably-mounted in a pit at one side of the gate, means carried by one end of said frameifor starting the gate toward closed position, `and frame-tilting means carried by the opposite end of said frame and extending into ithe path of vehicle wheels, said frame-tilting means being depressible by pressure thereonand transmitting their motion to said frame on` which they are carried.

5. A gate, a springtendingto open the gate, `means normally holding the gate closed', a platform, two slots in the platform, levers project-ing through said slots and in the path of vehicle wheels, a frame `tiltablymounted below the platform, yieldingly mounted fulcrums `for said levers, connec tions between said fulcrums and said frame, gate-closing means actuated by said frame, and gate-releasing means actuated by said levers; said gate-closing means being operated by direct depression of said levers, and said gate-releasing means being operated by turning of said levers upon their fulcrums.

6.`A gate, and gate-opening mechanism comprising a frame tltably-mounted in a pit, two levers fioatingly-mounted on one end of said frame and extending into the path of vehicle wheels, said levers having downwardly 7 extending yokes; tension nected to said springs and connected with the gate for opening `the same, means normally holding the gate closed, and means operable by said levers together, for causing said gate-holding means to release the gate.

7. A gate, and gate-opening mechanism comprising a frame tiltably-mounted in a pit, two levers floatinglyhmounted `on one end Iof said frame and extending into the path of vehicle wheels, said levers having downwardly-extending yokes; tension springs connected to said yokes, cables connected to said springs and connected with the gate for opening the same, means normally holding the gate closed, means oper'- able by said levers together, for causing said gate-holding means to release the gate, and a `platform covering said frame, pit and springs and having slots through which said levers project.

8. A gate,and gate-opening` mechanism comprising a frame tiltably-mounted in a pit, two levers fioatingly-mounted on one end of said frame and extending into the path' of vehicle wheels, said levers having downwardly-extending yokes; tension springs connected to said yokes, cables connected to said springs and connected with springs connected to said yokes, cables con-`c the gate for opening the same, means normally holding the gate closed, and means operable by said levers together, for causing said gate-holding means to release the gate.

In testimony whereof I aiiix my signature,l

in the presence of two witnesses.

MINO BOOM.

Witnesses:

GEORGE Game, GEORGE FRITZ. 

